#include<stdio.h>
#include<string.h>
#define N 2000001
char s[N],u[N];
int v[1000],i,t,k,m,n,p[N];
int main()
{
    freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),scanf("%s%s",s,u),m=strlen(s),n=strlen(u);
    for(i=2;i<m;i++) {
        while(k&&s[k+1]!=s[i])
            k=p[k];
        if(s[k+1]==s[i])
            k++;
        p[i]=k;
    }
    for(k=0,i=1;i<n;i++) {
        while(k&&s[k+1]!=u[i])
            k=p[k];
        if(s[k+1]==u[i])
            k++;
        if(k==m-1&&s[0]==u[i-k]) {
            if(t<1000)
                v[t]=i-m+1;
            t++;
        }
    }
    for(printf("%d\n",t),t=t>1000?1000:t,i=0;i<t;i++)
        printf("%d ",v[i]);
    return 0;
}